Działa

$result = $pdo -> prepare('SELECT * FROM `tv_stations` LIMIT '.$_GET['jtStartIndex'].', '.$_GET['jtPageSize'].'');
$result -> execute();
$rows = $result->fetchAll(PDO::FETCH_ASSOC);


Nie działa

$result = $pdo -> prepare('SELECT * FROM `tv_stations` LIMIT :from, :num');
$result -> bindValue(':from', $_GET['jtStartIndex']);
$result -> bindValue(':num', $_GET['jtPageSize']);
$result -> execute();
$rows = $result->fetchAll(PDO::FETCH_ASSOC);